If you use an iPhone, iTunes sells the AAC file (similar quality to MP3). However, Apple files come with DRM protection—they only play on Apple devices unless you convert them.
Believe it or not, many public library apps (like Freegal or Hoopla) allow 3-5 free MP3 downloads per week, legally. Alternatively, Amazon Music often sells the track for $0.99. Use a (common for new users) to grab it for $0.00. One Moment In Time Mp3 Free Download
Unlike typical pop hits, "One Moment In Time" has a complex licensing history. It was produced specifically for a sporting event (the 1988 Summer Olympics) and later included on Whitney Houston’s album I’m Your Baby Tonight (1990 reissue) and various compilation albums. If you use an iPhone, iTunes sells the